Passive infrared ceiling sensor



FIG. 1 is a perspective view of a passive infrared ceiling sensor showing the new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view of thereof;

FIG. 4 is a top side side view thereof;

FIG. 5 is a bottom side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a back view of the sensor shown in FIG. 1.

The broken lines showing two short posts and a rectangular element show portions of the article forming no part of the claimed design. 

The ornamental design for a passive infrared ceiling sensor, as shown and described. 